New confirmed cases of COVID-19 (7-day smoothed) per million
Total_cases_per_million of COVID-19
Death COVID-19 (new_deaths_per_million)
New deaths attributed to COVID-19 (7-day smoothed)

New tests for COVID-19 (7-day smoothed). For countries that don’t report testing data on a daily basis, we assume that testing changed equally on a daily basis over any periods in which no data was reported. This produces a complete series of daily figures, which is then averaged over a rolling 7-day window ***

##### new_tests_smoothed_per_thousand COVID-19 (7-day smoothed).

Tests conducted per new confirmed case of COVID-19

given as a rolling 7-day average (this is the inverse of positive_rate)

Sources:

opendata ecdc

ourworldindata

Code book information